Flown Tail Fin Brake Flap Horse Collar, flown on Endeavour shuttle mission STS-54, and removed prior to its next mission, STS-57, Metallic collar measures 3.75 x 2. Piece is in a plastic bag with a handwritten tag labeled “Scrap” and dated January 27, 1993. Bag is stapled to a photocopy of a Kennedy Space Center Problem Report, filled out by a technician, identifying the horse collar as “frayed,” and dated January 27, 1993. In fine condition, with expected wear. RRAuction COA.